Furnace-door-operating mechanism.



Patented Nov. 5, 190i.

F. L. VOEGELEIN.

FURNABE DOOR OPERATING MECHANISM.

(Application filed Apr. 4, 1901.}

2 Sheets-Sheet I.

(No Model.)

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No. 685,886. Patented Nov. 5, l90l.

F. L. VUEGELEIN.

FURNACE DOOR'OPEBATING MECHANISM.

(Application filed Apr. 4, 1901.)

(No Model.) 2 Sheets-Shaet 2.

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- opening and closing devices.

NITED STATES PATENT ()FFICE.

FREDRIOK LEO VOEGELEIN, OF FALLS CITY, NEBRASKA.

FURNACE-DOOR-OPERATING MECHANISM.

EE'ECIFICATION forming part of Letters Yatent No. 685,886, datedNovember 5, 1901.

Application filed April 4 1901. Serial No. 54,348- No model-3 .To allwhom it may concern;

Be it known that I, FREDRIOK LEO VOEGE- LEIN, a citizen of the UnitedStates, residing at Falls City, (post-office address Box 245,) in thecounty of Richardson and State of Nebraska, have invented new and usefulImprovements in Furnace-Door-OperatingMechanism, of which the followingis a specification.

My invention relates to furnace-door attachments, and more particularlyto improved means for opening and closing a furnacedoor.

The object of the invention is to provide a furnace-door with novelmeans for opening the door by pressure upon a treadle and closing thesame automatically.

The construction of the improvement will be fully described hereinafterin connection with the accompanying drawings, which form a part of thisspecification, and its novel features will be defined in'the appendedclaims.

In the drawings, Figure 1 is an elevation of a portion of afurnace-front, showing the firedoor thereof equipped with my improvedFig. 2 is a side elevation of the treadle and its connections. Fig. 3 isa front elevation of a furnace-door provided with a modifiedconstruction of the opening and closing devices. Fig. 4 is a1ongitudiual section of the slide shown in Fig. 3, and Fig. 5 is avertical section through said slide.

Referring to Figs. 1 and 2, the referencenumeral 1 designates thefire-door of a furin bearings S and 9, projecting from thefurnace-front. Upon the shaft 7, adjacent to the bearing 9, is fixed adrum 10, to which is secured one end of a short chain 11, said chainpassing around the drum and being secured at its opposite end to an eye12, formed at the upper end of a lever 13,.fulcrumed upon a bracketltnear the base of the furnace, as best shown in Fig. 2. The lower end ofthe lever 13 is formed with an extension 15, terminating at its outerend in a treadle 16. The lever 13 and its extension 15 are arranged atan angle to each other,so that when the treadle is depressed the leveris thrown forward, thus effecting a revolution of the shaft 7 throughthe medium of the chain 11. This movement of the shaft 7 rotates thevertical shaft 3 through the intermeshing bevel-gears 5 and 6, and thedoor 1 being fixed to said shaft 7 is thus opened.

17 designates a chain secured at one end to the drum 10 and at itsopposite end to the upper end of a coil-spring 18, the lower end of saidspring being attached to one end of a chain 19, having its opposite endattached adjacent to the fulcrum-point of the lever and treadle. Thechains 11 and 17 are so relatively arranged that one winds upon the drumas the other unwinds, and hence when the chain 11 unwinds by the outwardmovement of the lever 13 the chain 17 winds upon the drum, thusexpanding the spring 18, and as soon as the treadle is relieved ofpressure the spring con tracts, thus reversing the movement of the shaft7 and closing the door 1, as will be obvious from the drawings.

The construction shown in Figs. 3, 4:, and 5 differs from that abovedescribed. In this embodiment of the invention the shaft 7 and itsoperating lever, treadle, and retracting means are the same as thecorresponding parts in Figs. 1 and 2; but instead of securing the doorto the vertical shaft 3 I hinge the door in the usual manner upon aspindle 20 and employ a lever 21, pivotally secured at one end to theupper end of the shaft 3% and provided at its opposite end with abracket 22, within which is supported a vertical shaft 23, havingmounted thereon antifriction-rollers 24. These rollers travel within aguideway 25, extending longitudinally of the door and suitably securedthereto or formed thereon. The operation of this modified constructionof the invention is substantially the same as that above explained inconnection with Figs. 1 and 2, the only difference being that the dooris opened and closed through the medium of the lever 21 instead ofdirectly by the movement of the shaft 3.

I claim- 1. Thecombination with a furnace-door, of-

means for opening and closing said door, comprising a vertical shaft anda horizontal shaft; connection between the vertical shaft and the door;intcrmeshing gearing on said shafts; oppositely-disposed chains on saidhorizontal shaft; a lever and treadle connected to one of said chains,and a retracting-spring connected to the other chain.

2. The combination with a furnace-door, of means for opening and closingsaid door, comprising a vertical and a horizontal shaft; intermeshinggearing on said shafts; connections between said door and said verticalshaft; a drum on said horizontal shaft; oppositely-disposed chainssecured to said drum; a lever provided with a treadle extension andconnected to one of said chains; and a retracting-spring connected tothe other chain.

3. The combination with a furnace-door, of means for opening and closingsaid door-comprising a vertical shaft to which said door is rigidlysecured; a horizontal shaft; intermeshing bevel-gears on said shafts; adrum on the horizontal shaft; oppositely-disposed chainson said drum; alever connected to one of said chains; a treadle projecting from saidlever at an" angle thereto; and a retracting-spring connected to theother chain.

4. .The combination with a furnace-door, of a revoluble horizontal shaftsupported below the door; a bevel gear-wheel adjacent to one end of saidshaft; a drum fixed to said shaft near the opposite end thereof; a leverand treadle for revolving said shaft; means for retracting said shaft; avertical shaft carrying a bevel gear-Wheel meshing with the bevelgear onthe horizontal shaft; and connections between said vertical shaft andthe door for opening and closing the latter.

In testimony whereof I affix my signature in presence of two witnesses.

FREDRICK LEO VOEGE LEI N.

V \Vitnesses:

J R. WILHITE, A. J. WARD.

